The Dormer A108 Metric Split Point HSS Jobber Drill Bits are designed specifically for machining stainless steels. The quick spiral helix enables rapid swarf removal. Manufactured to DIN 338 RW / BS328 / ISO 235. Specification Flute Geometry: Quick Helix, Right hand spiral.Point Angle: 135°: up to 1.5mm: 135° Split Point, 1.6mm, 1/16 and above.Surface Treatment: Blue.Material: High Speed Steel.